
Karpathy's observations on how LLMs fail at coding, codified into four rules the agent follows: think before coding (state assumptions, ask instead of guessing), simplicity first, surgical changes, and goal-driven execution.
The lazy senior developer ruleset: before writing code the agent climbs a decision ladder (is it needed, does something reusable exist, is there a built-in) and only then writes the minimum.
skillgild install ponytailLicense: MIT · Created by Dietrich Gebert

Pick your agent. The wrapper only tells your agent how to start a session. The skill's instructions arrive with each session, after your access is checked.
Sign in once from your terminal.
skillgild loginInstall this skill for Claude Code.
skillgild install ponytail --agent claude-codeRegister the SkillGild MCP server with Claude Code.
claude mcp add --scope user skillgild -- $(command -v skillgild) mcpStart a session, follow its guide, then end it. Create an API key under Account and pass it as a bearer token.
# Prints the session ID, its tools and the instructions for your agent
skillgild session ponytail
skillgild end <session-id>Run skillgild install ponytail --agent claude-code and connect the SkillGild MCP server (skillgild mcp). When a task matches, your agent starts a session, which uses one of your 25 free runs this month, and follows the skill's instructions. Use --agent codex, cursor or gemini-cli for other clients.
Yes. It includes 25 free runs every month on SkillGild. Ponytail is open source (MIT) by Dietrich Gebert; SkillGild packages it from https://github.com/DietrichGebert/ponytail at a pinned commit and credits the author.
It runs in your coding agent with your own model. SkillGild checks your monthly allowance and delivers the skill's instructions for each session; it makes no model call and never sees your project unless your agent sends it.
The project lists Claude Code, Codex, Cursor, Copilot, Windsurf, Cline, Kiro, OpenCode, Gemini and 10+ others. It is a plain Agent Skills folder (SKILL.md plus supporting files), so any client that reads that format can load it.
Setup steps and worked examples for this kind of skill.